.px2rem(@name, @px) {
    @{name}: @px / 75 * 1rem;
}

body,
html {
    background: #d8cecc;
    background-image: url(../img/fo-bg.png);
    background-size: 100%;
    background-repeat: no-repeat;
}

.header {
    z-index: 99;
    width: 100%;
    background: #2f2f2f;
    .px2rem(height, 100);
    .px2rem(line-height, 100);
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    justify-content: space-between;
    span {
        color: white;
        .px2rem(font-size, 32);
        font-weight: bolder;
    }
    span:nth-child(1) {
        .px2rem(margin-left, 24);
    }
}

.posi {
    width: 100%;
    .px2rem(height, 430);
    .px2rem(padding-left, 20);
    position: fixed;
    .px2rem(bottom, 140);
    left: 0;
    //  background: wheat;
    .arrow {
        .px2rem(height, 430);
        .px2rem(width,255);
        .px2rem(line-height, 40);
        border-radius: 10px;
        background: #e9e7e0;
        img {
            display: block;
            margin: 0 auto;
            .px2rem(margin-top, 60);
            .px2rem(margin-bottom, 120);
            .px2rem(height, 150);
            .px2rem(width, 200);
        }
        p{
            text-align: center;
        }
        p:nth-child(2){
            .px2rem(font-size,32);
            font-weight: 600;
        }   
        p:nth-child(3){
            .px2rem(font-size,20);
            font-weight: 500;
            color: #666666;
        }   
    }
}